Martin v



- (No Model.)

- M. V. B. EVESSON.

BOAT.

No. 597,195. Patented Jan. 11,1898.

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UNITED STATES PATENT @EE cE.

MAR-TIN V. B. EVESSON, OF ARANSAS PASS, TEXAS.

BOAT.

SPECIFICATION forming part of Letters Patent No. 597,195, dated January 11 1898.

Application filed May 28, 1896. Serial No. 593,452. (No model.)

To all whom it may concern.-

Be it known that I, MARTIN V. B. EVESSON, a citizen of the United States, residing at Aransas Pass, in the county of San Patricio and State of Texas, have invented certain new and useful Improvements in Boats 3 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in the construction of hulls of boats, the object of the same being to increase the speed and insure greater safety and stability in sailing vessels, row-boats, canoes, and the like.

The invention consists in centrally cutting away or grooving the under side of the hull, the said groove beginning at a point just abaft the stem and rising gradually until it reaches the stern of the boat. By so doing there are formed on each side of the bottom of the hull ridges or concaved portions extending longitudinally throughout the Whole length of the hull. These concaved portions or ridges are tapered at their rear ends to facilitate the escape of the Water from the stern of the boat.

Other objects and advantages of my improvement will hereinafter appear and the novel features thereof be'specifically defined in the claim.

My invention is clearly illustrated in the accompanying drawings, in which- Figure 1 represents a bottom plan view of a hull constructed according to my invention. Fig. 2 is a vertical longitudinal section through the same. Fig. 3 is a cross-section on the line X X of Fig. 1.

Like reference-numerals indicate like parts in the different views.

The hull 1 as constructed by me is cut away or grooved centrally along its bottom, as shown at 2, the said groove startingat a point just abaft the stem, the line of the groove gradually rising from said point to the stern of the boat. This groove forms on each side of the bottom of the hull ridges or convex portions 3 3, which are tapered at their rear ends, as shown. at 4, for the ready escape of the water therefrom. A center keel or centerboard, or both, may be used in connection with myimproved hull to prevent the boat making leeway. By my construction, however, the hull may be made sharper relative to the sail-carrying capacity of the boat than any deep-draft vessel, and a hull constructed according to my invention has the further advantage of an easy entrance into the water, as the central grooved portion of the bottom. rises upward toward the stern and aids in reducing the pressure against the bottom as the hull is driven forward. The main buoyancy and sail-carrying power of the boat are obtained by reason of the convex portions of the bottom of the hull, by means of which great stability is acquired independently of ballast. The extreme width of the hull can be continued out to the stern, and by tapering the rear ends of the convex portions of the bottom an easy escape for the water is provided, and by so doing the stability is still further increased by making it possible to carry more sail according to the diaplacement than boats of the ordinary type, because the middle or keel portion of a deepdraft vessel is a detriment rather than an aid in carrying sail and actually assists in throwing the vessel over on her side. This effect in the old forms of construction must be overcome by adding ballast, which thereby increases the displacement and the motive power necessary to drive the boat. I therefore attain by grooving or cutting away the central portion of the hull longitudinally greater stability, provide for an easy escape of the Water'with the least possible suction, and enable the boat to be driven through the Water more easily and consequently faster. The danger of upsetting in rovv-boats, canoes, &c., is also reduced to a minimum.

Having now described my invention, what I claim as new, an d desire to secure by Letters Patent, is-

As an improvement in boat construction, the herein-described hull, the same being grooved centrally along its bottom, from a point just abaft the stem, with the line of the groove gradually rising from said point to the stern of the boat, thus forming upon each side of the central. portion of the hull convex ridges tapering near their rear ends upon curved lines from near the longitudinal center of the hull and extending to the stern and at a point near the stern inclining upward as they approach the stern, whereby the escape of the Water is facilitated and giving greater stability to the boat, all substan- 'tially as herein shown and described.

In testimony whereof I have signed this specification in the presence of two subscrib- :0 ing witnesses.

MARTIN V. B. EVESSON.

Witnesses:

JAMES M. ADDLE, T. H. WALKER. 

